$\text{@JinWook}$

The teacher said to his students "We will have an English test tomorrow".

`=>` The teacher said to his students (that) they would have an English test the next day

`=>` Cấu trúc chung câu tường thuật : 

           S + said/told/... + (sb) + (that) + S(chuyển ngôi) + V(lùi thì)

`=>` Các từ/thì lùi trong câu:

  will `->` would

  tomorrow `->` the next day, the following day

  we `->` they (đổi ngôi, xưng hô)

$\text{@Bulletproof Boy Scout}$

The teacher said to his students ( that ) they would have an English test the following day 

` - ` Cấu trúc câu tường thuật : S + said ( to sb ) + ( that ) + S + V ( lùi thì ) 

` -` Đại từ nhân xưng we ` -> ` they 

` - ` Will + V nguyên mẫu ` ->` Would + V nguyên mẫu 

` - ` Tomorrow ` -> ` The next day / The following day